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4
Boston Gear • 800-825-6544
P-3002-BG
Notes:
1. Mounting bolts must be minimum 160,000 PSI
tensile, Rc 36-43.
2. Dowel pins must be minimum 150,000 PSI shear.
Rc 50-58 core hardness.
ll. Mounting Sprockets Or Sheaves To
Clutch.
A. Type “T” Housing
1. Inspect mating pilots on clutch and sprocket
or sheave for nicks or burrs and remove as
required.
2. Position sprocket or sheave on housing and
align dowel pin holes.
3. Attach sprocket or sheave to housing with
mounting bolts and high collar lock washers.
Refer to Table 1 for recommended seating
torques.
4. Finish ream sprocket or sheave for dowel
pins. Refer to Table 1 for dowel pin and
recommended ream sizes.
5. Install dowel pins to a point where they bottom
in housing.
Torque Adjusting Screw
Square Wrench Socket
Milled Depth
For Max. Torque
Reset Spring
Lock Screw
Reset Spring
Disc.
Milled Depth For
Set or Min. Torque
Size
Screw
Size
Qty
Dowel
Size
Qty
Seating
Torque
Ream
Size
1
1/4-20
3
1/4
1
150 in.lb.
.2495
2
5/16-18
3
5/16
1
305 in.lb.
.3120
3
3/8-16
4
3/8
1
545 in.lb.
.3745
4
1/2-13
4
1/2
1
1,300 in.lb.
.4995
5
5/8-11
6
5/8
1
2,530 in.lb.
.6245
Size
Thread
Depth
Bolt
Circle
Pilot Dia.
+.000
- .002
1
1/4-20
.50
2.375
1.875
2
5/16-18
.50
3.000
2.250
3
3/8-16
.62
4.125
3.250
4
1/2-13
.87
5.000
3.203
5
5/8-11
1.00
6.250
4.125
3 Tapped Holes at 120°
120° Typ.
20°
60°
1 Dowel Hole at 60°
Sizes 1 and 2 Mounting Hole Pattern
4 Tapped Holes at 90°
90° Typ.
15°
20°
30°
1 Dowel Hole at 30°
6 Tapped Holes at 60°
60° Typ.
14°
20°
14°
1 Dowel Hole at 14°
Sizes 5 and 6 Mounting Hole Pattern
Sizes 3 and 4 Mounting Hole Pattern
Figure 5 - Type “T” Standard Mounting Hole Patterns
Figure 4A
Table 1 - Mounting Hardware Information
Table 2 - Type “T” Mounting Hole Patterns